The effect of mechanical stress, Ï , on electrode potential, E, was studied under zero current conditions. Silver wires in contact with AgNO3 solutions were exposed to tensile stress and the variation of the potential was measured in a two-electrode cell. The change in the steady state, Î E, was found to be proportional to Ï whereas the time dependence, E(t), could be reasonably described by an exponential function. The Î E .italv;s. Ï functions were understood in terms of the electrostatics of the double layer enabling one to evaluate the stress dependence of the potential of zero charge, (â E 0/â Ï ) = 25.6 ± 1 μV MPa^{â 1}; this experimental value is supported by a theoretical estimation.